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Embedded system architecture for an WLAN-based dual mode mobile phone

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4 Author(s)
Sung-Bong Jang ; Dept. of Comput. Sci. & Eng., Korea Univ., Seoul, South Korea ; Young-Gab Kim ; Hong-Seok Na ; Doo-Kwon Baik

This paper presents new embedded system architecture (ESA) for improving the voice quality in a WLAN/Cellular dual-mode mobile phone. The proposed architecture is based on a dual-core scheme and its main functional blocks are composed of VoIP Remote Procedure Call (VRPC), an audio bridging scheme, and a Server-Assisted Call Management (SACM) algorithm. In order to illustrate the aims of the proposed approach, prototype systems are implemented, and evaluated by measuring average Mean Opinion Score (MOS), and Mouth-To-Ear (M2E) delay. The experimental results show that the proposed approach results in greatly improved voice quality.

Published in:

Consumer Electronics, IEEE Transactions on  (Volume:55 ,  Issue: 3 )